The experts think that India’s population may be ______than China’s by 2020.

You haven’t watched the movie《Lost in Thailand》,have you–______________. How I want to watch it again！

How amazing it is that astronauts are exploring outer space!-It’s a challenge, I guess, ______ man against nature

When we meet our friends, we get ________about something and end up______ in Chinese.

He failed to ______ himself to the new environment.